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这也对劳动力供给和养老金制度提出了挑战。
It also challenges the labor force supply and the pension system.
youdao
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如果一个州对一份养老金做出了承诺，它就必须支付。
If a state has promised a pension, it must pay.
youdao
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如果一个州对一份养老金做出了承诺，它就必须支付。
If a state has promised a pension, it must pay.
youdao